2 syllables:
blowing, boeing, boing, bowing, coing, crowing, drohung, flowing, froing, glowing, growing, hoeing, hoing, knowing, koing, lowing, poing, rowing, sewing, showing, slowing, snowing, sowing, strowing, throwing, toeing, toing, towing, trowing, yoing, blowen, blowin, blow in, bohen, bowen, brohan, chaoan, coen, cohen, cowen, co une, dough in, drohan, drohen, flowen, flow in, fro in, glow in, goin', go in, growan, grow in, hoe in, know in, kohen, lowen, low in, mowen, no in, owen, quo in, rohan, rowan, rowen, rowin, row in, sewin, show in, slow in, snow in, so in, though in, throw in, toe in, tow in

3 syllables:
agoing, all-knowing, anschauung, backflowing, bestowing, childcrowing, churchgoing, cock-crowing, cockcrowing, cold-shoeing, dadoing, demoing, elbowing, escrowing, fallowing, farrowing, fast-growing, filmgoing, flat-growing, foregoing, foreshowing, forgoing, forthgoing, free-flowing, glass-blowing, glassblowing, homegoing, in-going, inflowing, ingoing, ingrowing, intoeing, low-growing, mind-blowing, on-going, ongoing, outflowing, outgoing, outgrowing, plateauing, playgoing, pogoing, reflowing, regrowing, seagoing, self-knowing, siloing, slowgoing, soloing, tall-growing, tangoing, tiptoeing, tourcoing, unknowing, way-going, waygoing, windrowing, winegrowing, winnowing, ago in, although in, baidoan, below in, bilbaoan, cardoen, dipnoan, garryowen, idoine, minoan, plateau in, rousseauan, samoan, sangoan, tanoan

4 syllables:
aforegoing, away-going, buffaloing, cameoing, concertgoing, easy-going, easygoing, embargoing, folioing, foreknowing, furbelowing, moviegoing, nonchurchgoing, oceangoing, overblowing, overflowing, overgoing, overknowing, overthrowing, radioing, rodeoing, steady-going, thoroughgoing, torpedoing, undergoing, weltanschauung, whistle-blowing, whistleblowing, woolward-going, acetoin, anthozoan, baron-cohen, bryozoan, caramoan, choritrohin, costanoan, croatoan, ectozoan, eli cohen, endozoan, entozoan, epizoan, epozoan, halesowen, hemozoin, hydrozoan, inishowen, matrimoine, mesozoan, metazoan, ohioan, parazoan, patrimoine, polyzoan, protozoan, rohan-rohan, scyphozoan, sporozoan

5 syllables:
manifestoing, ocean-going, theatergoing, actinozoan, eumetazoan, heliozoan, judith love cohen, mycetozoan, spermatozoan

6 syllables:
leucocytozoan

7 syllables:
allegra mostyn-owen

8 syllables:
flagellated protozoan

9 syllables:
marinejegerkommandoen

2 syllables:
owing, throw-in, toe-in